Grinding-machine.



U. STEINER.

GRINDING MACHINE.

APPLICATION TILED JULY 26, 1912.

1,078,563. Patented Nov. 11, 1913.

5 SHBETSBHEET 1.

U. STEINER. GRINDING MACHINE.

APPLICATION FILED JULY 6, t 1,078,563. 2 Patented Nov. 11, 1913.

5 SHEETSSHEET 2. 4

43 v 70.9 Z15 249 3 J id 1 51 U. STEINER.

GRINDING MACHINE. APPLICATION FILED JULY 26, 1912.

Patented Nov. 11

5 SHEETS-$11231 3.

811 van-01 Patented Nov. 11, 1913.

5 SHEETS SHEET (gwue/mto'u U STEINER GRINDING MAOHINE. APPLIOATION FILED JULY 26, 1912.

as, WJ W,

U. STEIN ER. GRINDING MACHINE,

APPLIUATION FILED JULY 26, 1912. a Lfl'yfififi I Patented Nov. 11, 1913.

5 SHEETS-SHEET 5. x1

ULRICH STEINER,

OF WAYNESBORO, PENNSYLVANIA, ASSIGNOIR- T LANDIS TOOL COMPANY, OF WAYNESBORO, PENNSYLVANIA, A CORPORATION.

GRINDING-MACHINE.

Specification of Letters Patent.

Patented Nov. ii, iota.

Application filed July 26, 1912. Serial No. 711,701..

i To all whom it'may concern:

tages are secured contributing to greater proficiency and accuracy in the operation and result, all as will be hereinafter more fully described and-claimed.

Referring to. the accompanying drawings which. are made a part ,hereof, and on which similar reference'characters indicate similar parts, Figure 1 is a front elevation of a portion of a grinding machine embodying my said invention, the general construction of the machine being of the well known Landis type to which this invention particularly relates, Fig. 2 a side elevation of the transversely movable grinding wheel base and the slide by which it is mounted on the longitudinal movable carriage, Fig. 3 a sectional elevation of the automatic feed mechanisms for the grinding wheel, Fig. 4

a sectional'plan view of the same on the dotted line i -4 in Fig. 3, Fig. 5 a vertical sectional view on the dotted line 5-5 in Fig. 4:, Fig. 6 a sectional view on the dotted line 6-6 in Fig. 5, Fig. 7 a detail perspective view of the feed regulating plate, Fig. 8 a detail sectional View through a portion of the grinding machine illustrating the means for operating the weighted plunger, Fig. S) a detail sectional view on the dotted line 9-9 in Fig. 8, Fig. 10 a vertical see tional view through the beveled gear and the adjacent parts, Fig. 11 a face view of the cam ring, and Figs. 12 and 13 detail views illustrating parts referred to, more clearly. I

In said drawings the portions marked A represent the bed or casing,B the grinding wheel carriage, and C the grinding wheel base, all of which parts are in general of the well known Landis'type.

Referring in detail..to the drawings, 1 designates a drum moiinted upon a shaft 2 able manner.

within the casing A of the grinding machine. A belt 3 passes over said drum and drives a pulley 4 on the grinding wheel spindle for imparting motion to the grind-- mg wheel 5. The belt 3 passes over a tens oning pulley 6 and. an idler 7 the tow sioning pulley 6 being mounted in any suit- In addition to these pulleys. describedthe belt 3 also passes over a pulley 8 mounted upon a shaft 9 for the purposeof operating the rapid feed mechanisms. A sleeve 10 is slidebly mounted uponsaid shaft 9, said sleeve having se cured thereto friction cones 3.1 and 1,2, the

said cone 11 being provided with a sleeve 13 having therein a groove let. A ring 15 is loosely mounted within the groove it said ring being secured to a yoke 16 means of pivot bolts 1 Z. The yokelfiis pivotally nioimted at 1.8 on an arm 19 formed on a. 20 in which bearing one end of the she 9 is mounted. The yoke 16 is provided with a right angular arm 21 pivoted at 2% to lever 23 which extends through the casing (t and is ivoted to the lower end of a lever 24 within convenient reach of the operator. A friction disk mounted upon a shaft 26 is adapted to engage either one of the cones 11 or 12 when said cones are brought into position by manipulation of" the lever 2%. The shaft is mounted in a bearing 2"! and has secured thereon a beveled pinion 28 which meshes with a pinion 29 secured to a shaft 30 nmunl'ed Within the tubular bearing 31 extending upward from the ens ing a on the ciirriz-ige. Another pinion is mounted on the'l er end of shaft 30 below pinion $19 which meshes, with a beveled gear 33 mounted upon a horizontal shaft 34:, which is mounted in a suitable bearing Said shaft has a beveled pinion 36 secured thereto which meshes with a beveled pinion 37 on one end of a screwshaft 38,-which is secured in a bearing 39 on the longitudinally movable carriage B. The. base C is mountedto traverse across the longitudinally movable carriage B in the usual manner and carries the grinding Wheel 5. A nut 40 is carried by said base and the threaded portion of the shaft- 38 passes through said out and imparts motion to the base C in either direction through the operation of the friction and beveled gears previously described. It obvious from the foregoing description t-l'iat the direction of I rotation of the shaft 38 and consequently the direction of travel of the base 0 is determined by the contact of disk-25 with either of the cones 11 or 12.

Rigidly mounted upon the shaft 30 is a ring 41, the said ring having a hub 42 for engagement with the said shaft, and also having rigidly secured upon its periphery a ratchet ring 48. The teeth of this latter ring are adapted to be engaged by a pawl t1 mounted upon a stud 45 secured in an arm 416. This arm is formed upon a sleeve 17 rotatably mounted upon the shaft 30 imme diately below the ring 4:1, the pawl 44 engaging theteeth of the ring 48 and imparting movement thereto when the arm 46 is moved in the direction of the arrow shown in Fig. dot the drawing. The pawl 44 is held into engagement with the teeth of the ratchet 13 by means of a spring 48. The sleeve 47 is formed with a plurality of beveled teeth 49 for engagement with similar teeth 50 formed upon the upper end of one arm 51 of an L-shaped lever. This lever is pivoted at 52 to the tubular bearing 31 and its opposite arm is formed with a segmental gear 54. The teeth of this gear are adapted to engage a rack 55 formed upon a sleeve 56, secured by a set-screw 57 to a vertically movable plunger 58. The plunger 58 is mounted to slide vertically within a sleeve 59 mounted Within the casing a, and is held in its. lowermost position by means of a,

weight 61 mounted thereon. The lower end of this plunger 58 has secured thereto a roller 62 which rests upon an arm 63 rigidly secured to a shaft 64: mounted in suitable beari'ngs within the carriage. Said shaft 6 1 has secured thereto a radial blade 65, the said shaft and blade extending the full length of the carriage B so that the blade will at all times engage roller 66 mounted on a pivot carried by a collar 67 upon a horizontally movablerod 68. The rod 68 is mounted in a bearing 69 in the machine casing A and is operated by means of a cam 70,'the said cam being formed upon a ring 71. This ring 71 is mounted upon a horizontal rim 72 of a beveled gear 73, the said gear being mounted upon shaft 7% and. receiving motion from the pinion 75 mounted upon a shaft connected with the driving mechanism ofthe longitudinally movable carria n B. The ring 71 carrying the cam 7 O- is mounted to normally slip upon the rim 72 of the gear 73, as will be presently described, and is adapted to be fixedly secured to the said gear through themedium of a notched ring 76 fastened to the gear 73 by means of pins 77. The connection between the ring 71 and the ring 76 is made throughthe medium of a plunger 78, having a tooth or point 79 which is held in engagement with-the ring 76 by means of a spring 80. It 15 thus apparent that whenhth parts Leas es are in their engaged position the ring 71- will move with the gear 73, operating the cam of the said ring and causing the reciprocation of the rod 68, which rod bears against the blade 65 and raises the plunger 58, which operates the arm 51 and rotates the sleeve 17. In order that the ring 71 may be released from the gear 73 after the plunger 58 has completed a movement, said plunger 78 carries at its top a roller 81, the said roller being adapted for engagement with either one of a pair of lifting pawls 82. These pawls are formed upon the ends of rods 83 suitably secured as at 81 in the casing A of the machine, and held in proper spaced relation at their ends by a spacing bar 85. This bar, in addition to holding the cams properly spaced apart, lends rigidity to the outer ends of the bars 83 and prevents movement when the roller 81 comes in contact with either pawl When this takes place the tooth 7 9 of the plunger 78 is lifted from engagement with the notched bar 76 and releases the ring 71 from the gear 73.

By referring to Fig. 11 it will be noted that one side of ring 71 is formed with two free segmental flanges 150 connected by a clamping screw 151 by which said ring may be held to gear 73 by friction sutlicient to cause said ring to move back with said gear when it reverses and free rollers 81 from dogs 82 permitting point 79 of plunger 78 to engage the notches of ring 76 and lock the parts positively together until the other dog 82 engages roller 81 and releases said engagement. Said flanges 150 may be lined with leather or other frictional material as found desirable. A spring 152 is preferably interposed. under the head of clamping screw 151 "to maintain its tension as required.

Loosely mounted upon the ratchet ring 43 is a ring 86, the said ring having mounted thereon an adjusting worm 87 for engagement with a worm gear 88 formed upon the ring 41 to which the ratchet ring is secured. The worm87 is pivotally mounted as at 89 upon the ring 86 so that it may be swung into and out of engagement with worm wheel 88 as desired. Said worm 87 is normally held in engagement with wheel 88 by a spring 153, which spring issecured on the top surface of ring 86 and bears outwardly against the periphery of a knob 15% on the handle end of said worm, (see Fig. 13).

Said knob is formed with four notches in' its periphery equi-distant, or 90, apart, and

said spring is bent in its upright portion to form a point 155 to engage said notches, for

a purpose to be presently described.

The ring 86 just described has secured thereto by means of screws 90 an interference plate 91, (Figs. 6 and 12), the said plate being for the purpose of covering cer tain of the teeth of the ratchet ring 413 so that only a portion of the said teeth may be exposed for engagement with the pawl 44.

of the grinding wheel to the work onethousandth'of an inch and it follows that by giving said Work one-quarter of a turn, or

I suficient to'carry point 155 of spring 153 from one notch to the next in periphery of knob 154 the feed will be varied one-quarter of a thousandth of an inch. A handle 150 is proilided on ring 86 by which it may be turned by hand when worm 87 is disen- 'gaged. This may be accomplished by swingmg it outwardly on its pivot, knob 154 being swunginwardly against spring 153. This spring 153 not only serves to hold worm 87 normally in operative engagement with Wheel 88, but acts as a gage to determine the extent of its movement. At the same time said Worm may be readily held out of engagement while the feed regulating means is moved to approximate position by hand.

. The tubular bearing 31 of the shaft is provided with a projecting arm 92, which carries a pair of upright members 93 having a feed regulating plate 94 mounted on the upper ends thereof. This plate is provided with a vertical member 95, also adapted to cover a portion of the teeth of the ratchet 43 and arranged to work over the outside v of the interference plate 91. Said plate may be adjusted to and fixed in any desired position through the medium of clamping bolt till 96 extending through a segmental slot there in, which position or adjustment may be determined by scale 103 of plate 94 and a pointer 156 carried on adjacent upright member 93. The member 95.01? said feed regulating plate 94 is positioned to determine the forward feed of the grinding wheel, and consequently the amount of material to be removed from the work at each traverse of the carriage B, while the interference plate 91 is for the purpose of stopping said feed at a predetermined point as when the work has been ground to its exact finished size. A knock-out dog 97 is mounted upon a stud 98 on one of the upstanding members 93 and is adapted for contact with a pin 99 secured upon the under side of the pawl 44, the engagement of this pin with the beveled end 'graduations 103 are provided upon the feed plate 94, and graduations 102 are provided upon the edge of ring 41 for setting the worm 87. Extending from the sleeve 3 1 is an arm 106 carrying a stop 107 adapted to engage a dog 111 movably secured in a groove 112 in the underside of the ring 41. A set screw 157 is provided for securing dog 111 in adjusted position. The arm 106 also carries a pointer 109 while another pointer 110 is carried by said dog 111. Said pointer 109 is stationary and is used to determine the distance from which pointer 110 may be set. Dog 97 serves to throw pawl 44 out of operation at a fixed point regardless of the length of the stroke of. arm 46 carrying it, which variation is caused by variation in the torsional strain on shaft 64 at different positions, for, as will be seen, when the plunger 58 is opposite the rod 68 the torsion will be slight and consequently the pawl 44 Will .be moved farther than when the carriage is at its extreme position and shaft 64 under more or less torsion or twist. Said dog 97 extracts the pawl before it reaches its extreme forward movement and thus a uniformity of action is maintained in all positions of the parts.

The operation is as follows: The power being applied to the machine, shaft 8 is driven, as before described. By the manipulation of lever 24 the grinding wheel carriage may then be fed rapidly toward, or from, the work as desired, by the mechanism before described. After the grinding wheel. is approximately in contact with the work the power feed is thrown out of gear and it is fed up to operative position through the medium of the hand wheel 101. The automatic mechanism is then set for operation. Regulating plate 94 is aljusted so that the front end of its upright member 95 will permit the length of engage merit between pawl 44 and the teeth or ring to secure the length of stroke, or degree of rotation, to said wheel 43 desired to obtain the desired feed into the work. lting 86 is then turned to bring interference plate 91 to the position to throw said Jawl out of operation when the work has con ground to the predetermined size. Near the completion of the work if the operator finds that further reduction in the size of the work should be made he is enabled, by turning the worm 87, to turn back ring just the distance necessary to permit the further forward feed 01 the grimling wheel into the work required to secure the exact finished size desired.- A onc-quarter turn of the worm secures a one-quarter of a thousandth of an inch reduction in the size of the Work, and other fine adjustments can be secured in the same manner. These various adjustments are readily determined through the medium of the indicators and scales provided with various parts as before described. Thus as the carriage traverses back and forth and the cam 70 is oscillated rod 68 operates rock shaft 64 and reciprocates plunger 58 carrying racn 55, which through the engagement with the rack 54 and the angle lever composed of the arms 51 and 53, operates the sleeve 47 and through it pawl 4-1 to turn ring 41, which turns shaft 30 and through said shaft feeds the grinding wheel to the work,

The mechanism shown particularly in Figs. 9, 10, and 11 provides for the positive operation of plunger 58 or permits said plunger to stand idle after a completion of one movement until the carriage reverses, this result being secured through the medium of the normal frictional engagement between ring 71 and gear 72 and the positive lock engagement during the period of the movement between dogs 82, which movement is regulated to provide for one complete movement of said plunger.

It will tlus be seen that the traverse of the carriage can be regulated to suit the work and the feed of the grinding wheel regulated to automatically reduce it to a predetermined size, and that the grinding wheel can be moved rapidly toward and from the work by power, hus providing a machine of a very'accurate and eflicient character and one that is conveniently and easily operated.

iaving thus fully described my said in vention what I claim aS new and desire to secure by Letters Patent is:

1. In a grinding machine the combina tion of a frame, work supporting mecha nism, a grinding wheel carriage, operating mechanism for said parts, a grinding wheel mounted upon said grinding wheel carriage, and means for automatically feeding the grinding wheel to the work comprising gearing operated by the reversal of the carriage, means for regulatin the amount of feed at each reversal, means for limiting the feed at a predetermined point to secure the size of finished work desired, and means for varying the position of said limiting means embodying a worm connection the worm whereof is pivoted and adapted to be swung out of said connection when desired, sul stantially as set forth.

2. In a grinding machine the combination of work holding mechanism, grinding mechanism, means for automatically feeding the grinding wheel to the work operated by the carriage operating mechanism at each rcv-ersal of the carriage to feed the grinding wheel a predetermined distance, means for rendering said feed mechanism inactive ata predetermined point, and means for vary ing and determining the limit of feedembodying a worm wheel adjustment, said worm being mounted on a pivot and normally held in engagement by a spring which spring also serves as an indicat' r to deter mine the amount of adjustment, substantially as set forth,

3. In a grinding machine an automatic wheel and an adjusting worm engaging therewith, said worm formed with engaging notches in its periphery spaced apart to determine certain degrees of adjustn and a spring arranged to norn'ially hold said worm in engagement with said worm wheel and formed to engage said notches, suhsi air tially as set forth.

4. In a grinding machine an automatic feed mechanism for the grinding wheel con nected to be operated from the carriage op erating mechanism, an operatin shaft, a circular ratchet on said operating shaft, a reciprocating pawl for operating said ratchet step by step, an interference plate mounted to be adjusted on said circular ratchet and adapted to cover a portion the teeth thereof, means for adjusting said interference plate to limit the operation of said pawl, said adjusting means including a worm mounted on said interference plate and engaging with a worm wheel formed on said ratchet, said worm being mounted on a pivot and formed with notches in its riphery, and a spring mounted alon 3 the handle of said worm and arranged normally hold the same in engagement formed with a point for engaging said notches, s ibstantially as set forth. I

5. In a grinding machine an automatic feed mechanism for the grinding wheel comprising an operating shaft geared to feed said grinding wheel to and from the work, a

circular ratchet on said operating shaft, a

reciprocating plunger adapted to be operated at each reversal of the carriage, a pivoted angle lever having a segmental ratchet on one end engaging with a ratchet carried by said plunger, and a segmental ratchet en its other end engaging with a ratchet on asleeve, said sleeve mounted to oscillate on said operating shaft and having a radial arm extending adjacent to the edge of said circular ratchet, a pawl pivoted on said radial arm adapted to engage said circular ratchet, and a dog positioned adjacent to said pawl to throw the same out of engagement with said ratchet at a fixed point in its forward movement, substantially as set forth.

6. In a grinding machine an automatic feed mechanism for the grinding wheel com prising an operating shaft operatively geared to said feed mechanism, a circular ratchet on said ope 'ating shaft, an osciil-*-- ing sleeve also megnted on said shaft ha an arnreXtendifg to a point outside of circular ratchet, a pawl pivoted to said arm, m'vns for normally holding said pawl into engagement with said ratchet, a dog .in a fixed position in the path of said pawl for disengaging it from said ratchet, and means for oscillating said sleeve at each reversal of the carriage, substantially as set forth.

'4. An. automatic feed mechanism for the grinding wheel of grinding machines comprising a geared to feed mechanism, a circular ratchet fast on said operating shai'han 00" cillating sleeve mounted loosely on said sh. a pawl pivoted to an arm of said orcillating sleeve and adapted to engage said ratchet, a dog positioned to throw said pawl out of operative engag, nent at a fixed point in its forward movement, a gear on said sleeve, reciprocating plunger, an operative connection between said reciprocating plun er and said gear on said sleeve, and means or reciprocating said plunger at each reversal of the carriage, substantially as set forth.

8; din automatic feed mechanism for the grinding wheel of grinding machines comprising an operative shaft operatively con- ,nected to said feed mechanism, a circular ratchet mounted thereon, an oscillating sleeve carrying a pawl for operating said ratchet step by step, a regulating plate mounted on supports adjacent to the edge of said ratchet, means for adjusting said plate to expose more or loss teeth of said ratchet to the operation of said pawl, and means for reciprocating said pawl each reversal of v the carriage, substantially as set forth- 9. An automatic feed mechanism for the.

grinding wheel of grinding machines comprising an operating shaft operatively con-' for adjusting said plate toward or from theoperative position of said. pawl, means for determining the adjustment, and means for operating said pawl at each reversal of the carriage, substantially as set forth.

10. An automatic feed mechanism for the grinding wheel of grinding machines comprising an operating shaft operatively con nected to said feed mechanism, gearing connected with said operating shaft for turning it stop by step, a reciprocating plunger operatively connected to said means, a rock shaft extending from end to end of the grinding wheel carriage and carrying a operating shaft operativelyradial arm adapted to operate against-the lower end of said plunger, a reciprocating rod adapted to operate against the other radial arm carried by said rock shaft, and means for operating said reciprocating red at each reversal of the carriage, substantially as set forth.

11. An automatic feed mechanism for the grinding wheel of grinding machines comprising an operating shaft operatively connected to said feed mechanism, means for imparting intermittent motion to said oper ating shaft, a reciprocating plunger operatively connected to-said means, a rock shaft provided with a radial arm for operating said plunger in one direction, a radial plate extending the length of said shaft, a reciprocating rodoperating' against said plate 'to rock said shaft, and an oscillating cam carried by the carriage reverse mechanism for reciprocating said rod, substantially as set forth.

12. An automatic feed mechanism for grinding wheels of grinding machines comprising an operating shaft operativcly connected to said feed mechanism, a reciprocating plunger geared to said operating shaft to impart intermittent feed movement thereto, a rock shaft suitably supported, a radial. arm on said rock shaft carrying the lower end of said plunger, a radial plate also carried by said rock shaft, a reciprocating rod .operatively connected to said plate at one end and bearing against a cam formed on a cam ring at the other end, said cam ring normally mounted by frictional contact on a gear connected with the carriage feed mechanism, means for coupling said cam ring positively to said gear for a period in its movement, and means for disengaging said positive coupling at the end of said period, substantially as set forth.

13. An automatic feed mechanism for grinding wheel of grinding machines comprising an operating shaft' operatively con nected with said feedmechanism, a reciprocating plunger connected to impart. intermittent feed motion to said operating shaft, a weight for operating said reciprocating plunger in one direction, a rock shaft, a radial arm on said rock shaft operatively supporting the lower end of said plunger, a radial plate extending from said rock shaft, a reciprocating rod'o'peratively connecting with said plate at one end and hearing at its opposite end .on a cam slidablyconnected to a gear, a pawl for positively connecting said cam to said gear during a part of its movement, and dogs positioned to withdraw said pawl from engagement at the respective limits of said movement, substantially as set forth.

14. A feed mechanism for the grinding base of grinding machines comprising an operating shaft, a gear connection running Iltld from (said voperating shaft to means for sliding said base back and forth, another gear connection running from said operating shaft to a power shaft, said last-married gear connection embodyin a clutch adapted to be thrown into mesh tor operating said shaft in either direction, substantially as set forth,

15. A feed mechanism for the grinding wheel base of grinding machines comprising an operating shaft, a screw carried on the carriage and engaging with a nut on the base, a driving connection between said screw and said operating shaft, power shaft carried by said grinding wheel carriage, and gear connecting said power shaft iiiid said operating shaft which embodies a clutch adapted to couple said shaft to said power shaft for operation in either direction, substantially as set forth.

. In witness whereof, I have hereunto set my hand and seal at Washington, District of Columbia, this 23rd day of July, A. D. nineteen hundred and twelve. K

ULRICH SEEINER. [n s.] Witnesses:

E. W. Bnimrono, E. G. finnmnnrsf 

